By Eberhard Nieschlag, Hermann M. Behre, Susan Nieschlag
This is often the third, absolutely revised variation of a widely known textbook that keeps to symbolize the ultimate within the literature on medical andrology. It examines intensive all elements of male reproductive well-being, encompassing the elemental body structure of male reproductive functionality and a variety of problems. all of the chapters is written by means of awesome specialists within the box. one of the subject matters coated are: Testicular functionality, sperm maturation and fertilization, diagnostic systems, infertility, fundamental and secondary hypogonadism, late-onset hypogonadism, erectile disorder, genetic issues, environmental affects, psychology and sexual drugs, testosterone treatment, assisted replica: TESE and ICSI, cryopreservation, male birth control and ethics in andrology.
This quantity will function a textbook for the newcomer to andrology, whereas offering the skilled health care professional with a precious reference paintings. it's going to attract all who're thinking about male reproductive health.
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Additional resources for Andrology: Male Reproductive Health and Dysfunction
Weinbauer et al. 100 Prosimian monkeys New World monkeys d1 Old World monkeys Great apes / Humans 80 multi-stages [%] b4 a1 Otolemur spec. 4 stages / tubule Fig. 6 Frequency (%) of seminiferous tubules containing more than one spermatogenic stage versus the number of stages per tubular cross-section across the primate order. a1–a2: prosimians, b1–b5: New World monkeys, c1–c6: Old World monkeys, d1, d2 and d4: great apes, d3: men. Note the clustering of multi-stage distribution and the increased number of stages in New World monkeys, great apes and humans.
1999) ). , the complete succession of all stages (Johnson et al. 1996). At the most, 2–4 consecutive stages could be found on serial sections. Since the topographical distribution of the stages could be reproduced by assigning random numbers, the arrangement of the human spermatogenic stages along the seminiferous tubule might be at random. On the other hand, germ cell transplantation revealed that one spermatogenic stage represents a single clone of germ cells (Nagano et al. 2001). Therefore, variation in clonal size could lead to the appearance of several stages per cross-section (Wistuba et al.
The number of stages of spermatogenesis depends on morphological criteria. For the rat 14 stages (I–XIV) are used and 12 stages (I–XII) in macaques, For men, originally 12 spermatid maturation steps were described but a sixstage (I–VI) approach is currently used. More recently, the six-stage system has also been applied to Old World and New World primate species (Wistuba et al. 2003). The succession of all stages along time is called the spermatogenic cycle. The duration of the spermatogenic cycle depends on the animal species and lasts between 8–17 days in mammals.